Investigation on Discrimination Characteristics of Atmospheric and Oceanic High-Spectral-Resolution Lidar

Abstract

Abstract: The combined analysis of the discrimination performance of the atmospheric and oceanic
high-spectral-resolution lidar (HSRL) can help the joint atmospheric and oceanic observation
research. An atmospheric and oceanic HSRL system based on the field-widened Michelson
interferometer (FWMI) discriminator is proposed in this work, which can be used to
retrieve the 180-degree volume scattering function of oceanic and atmospheric
particles. The core of the system is the combined-molecular dual channel,
in which the molecular channel uses FWMI discriminator to filter the particle
signal but transmit the molecular signal. It is shown that the retrieval error
will increase proportionally with the particulate scattering ratio (the ratio of
the total 180-degree volume scattering function to that of molecular), while the
enhancing of the spectral discrimination ratio (the ratio of the molecular
transmittance to the particulate transmittance) can significantly suppress
the growth trend of the retrieval error. Because molecular scattering and particulate scattering
are separated in the spectrum of oceanic HSRL, FWMI has a better discriminating
characteristics in the oceanic HSRL than in the atmospheric HSRL. The proposed HSRL
system based on FWMI can work in water and atmosphere, which is of great significance
to the performance improvement of atmospheric and oceanic lidar.

Key words: optical remote sensing, high-spectral-resolution lidar, atmospheric remote sensing;
oceanic remote sensing, field-widened Michelson interferometer

CLC Number:

TN958.98

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